Time-varying Mechanism of Flow Characteristics of Oil-water Medium in Pipeline Supported By the Cable-stayed Bridge

To explore the time-varying mechanism of how oil viscosity and water content influence the flow characteristics in crossing pipelines, a three-dimensional finite element model was developed using advanced large-scale finite element simulation software with an integrated fluid dynamics module. The simulation results were analyzed under varying viscosity and water content conditions, focusing on the fluid velocity, pressure distribution, and secondary flow behavior within the pipeline. The findings reveal that as the oil viscosity and water content decrease, the initial flow rate and pressure at each monitoring node increase. Moreover, the fluid velocity experiences two distinct changes as the oil-water medium passes through the pipeline, with the average velocity decreasing as viscosity and water content increase. Additionally, the total pressure fluctuation duration within the pipeline increases with higher viscosity and water content. These results provide valuable theoretical insights for studying the dynamic characteristics and fluid-structure interaction vibrations in crude oil transportation pipelines.